Answer: newme

AnswerCrossword Clue
NEWME

What a successful dieter might describe himself as

NEWME

"It's the ..." ("I've changed")

NEWME

Person after a lifestyle change, self-descriptively

NEWME
Moniker after a lifestyle change
NEWME
Self-description after a lifestyle change
NEWME"A Brand ..." (Dusty Springfield song)
NEWMEReinvented self-image
NEWMESelf-description after a major lifestyle change